Phase-known genotype
= Phase-known genotype
At several <genetic loci>, a phase-known genotype specifies which <alleles> occur together on each chromosome, hence its two <haplotypes>. An unphased multilocus <genotype> may be compatible with several haplotype pairs. For two heterozygous loci, $AB/ab$ and $Ab/aB$ have identical unphased genotypes but different transmission probabilities when <genetic linkage> is present.